Deafness isn't always genetic, or so you already know...Deafness is the recessive genes that goes and gone and then goes again...on just other people randomly...see, I had a great great grandfather who was deaf back in the 1880s...and he was proably born deaf as well so I was born the same way...must be in the blood, if you ask me lol so we never find out the mystery to this kind of problem but you can't fight the genes...it's fate.
Um, no offense dude but if she left you just because she finds out you are hard of hearing...then she's a real bitch. You know that not alot of people are brave enough to accept that they are in a relationship with a HOH or deaf person and afraid that they would often misunderstand eachother or something...see, they just dont have patience and just want to have the "perfect man" in their lives which will never happen...nobody is, and I mean NOBODY is perfect so...I hope that girl who was your "great girlfriend" has learned a lesson and get used to the fact that you are HOH and should just make up with you and stuff...but if she never did, then it's her problem.
But anyway, there will always be the best girl for you someday...you just gotta wait and see.